The speeding says it all. Dark car wasn't going to let the other car in no matter what, the white car was determined to pass the dark car no matter what, and road rage set in for both. See it all the time though with far less consequences. I'd say throw the book at both of them, but whoever was doing the work should get some culpability out of this as well. You're supposed to make it foolproof safe for those workers to work and there should have had much better barriers in place. I may be mistaken, but I think the opening to a work zone like this is supposed to be on the far side where you have to back into the work zone rather than pull into it.